8 1 2015 BRG PREMANT district heating pipe PRE Subject to technical changes 0 20 1 80 6 501 0 10 0 10 2 00 4 00 0 10 0 35 B 0 40 Underground construction work installation Trench widening in the area of the expansion pads The trench must be widened and deepened by at least 0 1 m on both sides in the area of the expansion pads Figures in m Trench profile with top hole To allow the steel pipes to be welded together perfectly and so that the sleeve joints can be executed neatly top holes must be made on each weld seam for larger dimensions but as a minimum on bends and T branches This can reduce the width of the normal trench profile Figures in m Expansion pad

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